Statin Induced Augmentation of Circulating Endothelial Progenitor Cells and Myocardial Viability in Patients With Ischemic and Nonischemic Cardiomyopathy
试验速览
- 阶段
- 4 期
- 状态
- 已完成
- 发起方
- 入组人数
- 9
- 试验地点
- 1
- 主要终点
- Change in Endothelial Progenitor Cells
研究概览
简要总结
The purpose of this study is to see if taking a cholesterol lowering drug Lipitor (Atorvastatin Calcium)will increase the number of endothelial progenitor cells (EPC's) circulating in the blood of heart failure patients taking this cholesterol-lowering drug, and if this will also show an improvement in the damaged areas of the patient's hearts as documented by MRI scans.
详细描述
This study involves the testing of blood for cholesterol levels and flow cytometry tests to count the number of EPC's in your blood. These tests are routinely performed to gain knowledge about a person's health. If any incidental findings are identified as a result of your participation in this research study, you will be notified and referred to your doctor or appropriate health care professional.
You are being asked to provide a blood sample that will be used to determine the usual numbers of EPC's circulating in the blood of healthy people who have no risk factors for heart disease. Your results will be compared with those of patients who have heart failure.
Flow cytometry is a special laboratory test that can count, separate, and detect characteristics of cells in blood. Your blood sample will be analyzed using flow cytometry. Endothelial progenitor cells (EPC's) are immature cells that are necessary for new blood vessel formation. EPC's will be separated by flow cytometry and counted. You will not be given the results of your flow cytometry study.
研究设计
- 研究类型
- Interventional
- 分配方式
- Non Randomized
- 干预模型
- Parallel
- 主要目的
- Treatment
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 85 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Ischemic Cardiomyopathy (as defined above) with ejection fraction < 35%
- •Non-ischemic Cardiomyopathy with ejection fraction < 35%
- •NCEP ATPIII indication for therapy with a statin drug
- •No statin therapy within previous 6 months of study enrollment
- •Prescribed stable doses of standard heart failure therapies including beta blocking agents, angiotensin converting enzyme inhibitors or angiotensin receptor blockers, and diuretic agents as required
排除标准
- •Pregnant or lactating
- •Myocardial infarction within 6 months preceding study enrollment
- •Primary valvular heart disease
- •Surgical or catheter based revascularization within the preceding 6 months
- •Documented viral or inflammatory myocarditis or cardiomyopathy
- •Peripartum cardiomyopathy
- •Infiltrative cardiomyopathies
- •Chemotherapy associated cardiomyopathy
- •Without indication for statin therapy
- •Contraindication to statin therapy including hepatic dysfunction, history of rhabdomyolysis or prior intolerance of statin therapy
- •Contraindication to magnetic resonance imaging
研究组 & 干预措施
Ischemic Cardiomyopathy
Patients with Ischemic Cardiomyopathy receiving Lipitor (Atorvastatin calcium).
干预措施: Atorvastatin Calcium (Drug)
Non Ischemic Cardiomyopathy
NonIschemic Cardiomyopathy receiving Lipitor (Atorvastatin calcium) treatment
干预措施: Atorvastatin Calcium (Drug)
结局指标
主要结局
Change in Endothelial Progenitor Cells
时间窗: Baseline - 6 months
Change in Endothelial Progenitor Cells (EPC) was assessed by extracting white blood cells from blood samples and labeling the white blood cells using the ALDEFLOUR system. Facscan analysis was then performed first isolating lymphocytic and monocytic cell lines, which contain the EPC populations, using forward versus side scatter plots. These cells were then scanned for fluorescence in the ALDEFLUOR frequency range allowing enumeration of progenitor cell lines. The measures of fluorescent cells was compared to numbers of unstained cells having the same back scatter range to correct for any background fluorescence.
Percentage Aldofluor Positive Cells
时间窗: Baseline - 6 months
The primary outcome measure is the percentage of cells of total analyzed that are positive for the Aldofluor assay. This commercially available assay tests cells for the enzyme aldehyde dehydrogenase that is expressed in stem cells and other early life cycle undifferentiated cells. It thus provides a measure of circulating primordial cells or cells that may serve as progenitors of destination mature cells. The percentages are designed from Facscan analysis of prepared blood cells and are quantified by quadrants defined by specific fluorescent bands and cell size distribution. The quantification of cells thus defined in the four quadrants is automatically determined by software resident in the facscan analysis system.
次要结局
未报告次要终点
研究者
Philip Binkley
Professor
Ohio State University